7 sinf 14-mashq yechim

7-sinf 14-mashq. 1. gidravlik press katta porshenining yuzi 600 cm2. uning kichik porsheniga 160 n kuch bilan ta’sir qilib, og‘irligi 12 kn bo‘lgan yukni ko‘tarishi uchun kichik porshenning yuzi qancha bo‘lishi kerak? ______________ gidravlik pressda bosimlar tengligidan; (1)-ifodadan kichik porshen yuzasini topsak; ga teng. 2. gidravlik press kichik porsheni 500 n kuch ta’sirida 7,5 cm pastga surildi. agar katta porsheni 1,5 cm ko‘tarilsa, uning ostida qanday ko‘taruvchi kuch yuzaga keladi? ______________ gidravlik press kichik porshenini pastga tushirishda qancha ish bajarilsa, katta porshenni yuqoriga ko’tarishda ham shuncha ish bajariladi, ya’ni; (1)-ifodadan; (2)-ifodadan kuchni topamiz; 3. gidravlik press kichik porshenining yuzi 5 cm2 va unga 60 n kuch qo‘yilgan. agar katta porsheng...

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